PR lto/66752
* tree-ssa-threadedge.c (simplify_conrol_stmt_condition): If we are
unable to find X NE 0 in the tables, return X as the simplified
condition.
(fsm_find_control_statement_thread_paths): If nodes in NEXT_PATH are
in VISISTED_BBS, then return failure. Else add nodes from NEXT_PATH
to VISISTED_BBS. */
* tree-ssa-threadupdate.c (duplicate_thread_path): Fix up edge flags
after removing the control flow statement and unnecessary edges.
testsuite/
PR lto/66752
* gcc.dg/tree-ssa/pr66752-2.c: New test.
* gcc.dg/torture/pr66752-1.c: New test
* g++.dg/torture/pr66752-2.C: New test.
From-SVN: r226125
